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These valves achieve this using pressure-compensated mechanisms, which automatically adjust the valve opening to ensure a steady flow rate. Some designs incorporate a dual-chamber configuration that enhances regulation at lower pressures, improving stability in applications such as irrigation, industrial water systems, and municipal water ...
A back-pressure regulator, back-pressure valve, pressure sustaining valve or pressure sustaining regulator is a control valve that maintains the set pressure at its inlet side by opening to allow flow when the inlet pressure exceeds the set value.
Needle valve for accurate flow control; Pinch valve, for slurry flow regulation and control; Piston valve, for regulating fluids that carry solids in suspension; Piston valve (steam engine) Plug valve, slim valve for on–off control but with some pressure drop; Solenoid valve, an electrically actuated valve for hydraulic or pneumatic fluid control
An air-operated valve, also known as a pneumatic valve, is a type of power-operated pipe valve that uses air pressure to perform a function similar to a solenoid. As air pressure is increased, the compressed air starts to push against the piston or diaphragm walls which causes the valve to actuate. Whether the valve opens or closes depends on ...
Brass-bodied float valve. An automatic bleeding valve or air release valve (ARV) is a plumbing valve used to automatically release trapped air from a heating system. Air, or other gas, may collect within plumbing. For water delivery systems to taps and basins, particularly with good main supply pressure, this air is usually flushed through with ...
A separate actuator on the piping releases pressure in the line if it crosses a threshold. This releases the pressure on the back of the seal, causing the valve to open. The essential parts of a PORV are a pilot valve (or control pilot), a main valve, a pilot tube, the dome, a disc or piston, and a seat. The volume above the piston is called ...
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